Stereotype platemaking machine



Feb; 18, 1936. J. J. WALSER v STEREOTYPE PLATEMAKiNG MACHINE 'T Sheets-Sheet 1 Original Filed Sept. 3, 1920 xwN k3 m x03 ATTORNEY Feb. 18, 1936.

J. J. WALSER STEREOTYPE PLATEMAKING MACHINE Original Filed Sept. 3. 1920 7 Sheets-Sheet 2 Feb. 18, 1936. J. J. WALSER 19,861

STEREOTYPE PLATEMAKING MACHINE Original Filed Sept; 3. 19 7 Sheets-Sheet 5 W ATTORNEY Feb. 18, 1936. J; WA E Re. 19,861

STEREOTYPE PLATEMAKING MACH I NE Original Filed Sept. 3. 1920 7 Sheets-Sheet 4 III! II II II II II. 1H1 II I] II II IHHI lllllllllllllllllllllllllll' Ill I'IIIIIIII Feb. 18, 1936. J. J. WALSER STEREOTYPE PLATEMAKING MACHINE 7 Sheets-Sheet 5 Original Filed Sept. 5. 1920 ATTORNEY Feb. 18, 1936. J J w s RE. 19,861

\ STEREOTYPE PLATEMAKING MACHINE Original Filed Sept. 3. 1920 Y-Sheets-Sheet 5 Feb. 18, 1936. J. J. WALSER STEREOTYPE PLATEMAKING MACHINE Original Filed Sept/3. 1920 '7 Sheets-Sheet 7 A TORNEY Reissued Feb. 18, 1936 PATENT OFFICE STEREOTYPE PLATEMAKING MACHINE Joseph J. Walser, deceased, late of Ann Arbor, Mich, by The Goss Printing Press Company, assignee, Chicago, Ill., a corporation of Illinois Original application September 3, 1920, Serial No.

Divided and this application March 15, 1922, Serial No. 543,959.

Original No.

1,593,110, dated July 20, 1926. Application for reissue July 6, 1935, Serial No. 30,146

58 Claims.

The invention relates to machines for making and operating upon stereotype plates, and in certain aspects thereof, the invention relates to a novel machine for casting such plates and finishing them ready to be put on a printing press.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention; the same being realized and attained by means of instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, con- 7 structions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and together with the description, serve to explain the principles of the invention.

Of the drawings:

Fig. 1 is a side elevation of a machine embodying the invention;

Fig. 2 is an end elevation, looking at Fig. 1 from the right, and showing the mechanism in casting position;

Fig. 3 is a vertical transverse section through the machine on line 33 of Fig. 1, looking in the direction of the arrows, showing the mechanism during the rotation of the casting core;

Fig. 4 is the same view as Fig. 3, but showing the mechanism holding the core stationary with the plate on top;

Fig. 5 is a transverse section through the machine, on an enlarged scale, on line 55 of Fig. 1, looking in the direction of the arrows, showing the plate clamped in position at the trimming station;

Fig. 6 is a fragmentary transverse section, on an enlarged scale, taken on line 66 of Fig. 1, looking in the direction of the arrows;

Fig. '7 is an end elevation, looking at Fig. 1 from the left;

Fig. 8 is a perspective, fragmentary view of a part of the mechanism for moving the hot metal supplying mechanism. to and from pumping position;

Figs. 9 and 10 are enlarged, fragmentary detail views, showing the operation of the left hand device shown near the center of Fig. 1 for holding the plate at the finishing station;

Fig. 11 is a fragmentary, detail horizontal section on line II-II of Fig. 5;

Fig. 12 is a horizontal fragmentary section on line I2I2 of Fig. 1; showing the plate trimming devices;

Fig. 13 is a detached detail on line l3|3 of Fig. 1, of the clamps engaging the straight edge of the plate at the finishing station;

Fig. 14 is a vertical section on an enlarged scale, taken on line I4|4 of Fig. 1 showing the relation of the plate carrier to the delivery table; and

Fig. 15 is a perspective detail of the cutter for shaving or finishing the concave ribs on the inside of the stereotype plate;

Fig. 16 is a fragmentary detail in end elevation of the plate lifting mechanism;

Fig. 17 is a diagrammatic view of the electrical connections and controls for the machine;

Fig. 18 is a side elevation corresponding to Fig. 16 and looking thereat from the left; and Fig. 19 is a transverse horizontal section on line |9I9 of Fig. 18.

This application is a division of the inventors copending application Ser. No. 407,984, filed Sep- L member, these together constituting a casting chamber. The concave member has up and down movement to and from the core for casting the plate, and for subsequent clearance in removing the plate, inserting and removing the matrix, etc. The core after casting makes a half rotation to bring the plate to delivery position. The plate is thus brought above the core, and is then lifted vertically clear of the core preparatory to its removal or conveyance automatically by the machine to the finishing mechanism. Devices are provided which operate automatically to hold the core with the plate above it while the plate is being lifted and then removed to the finishing mechanism.

The hot metal is poured into the casting champroper. The hot metal pump moves to and from 5 pouring position through the automatic operation of the machine and the pump is preferably hand operated.

The completion of the metal pouring operation automatically starts into operation the movements of the casting mechanism, already described, and sequentially thereafter the subsequent movements or operations of the finishing mechanism.

The cast plate after being lifted or freed from the core is conveyed to a finishing station, and there, while the plate is at rest, the two straight edges are trimmed, the risers or waste metal being cut off, and the interior arcuate ribs are trimmed or shaved. These operations on the plate are effected by a travelling carriage which moves past the stationary plate. This carriage has a pair of cutters which trim the straight edges and cut off the waste metal therefrom, and has also an arcuate cutter which passes within the curved plate and trims or shaves the arcuate ribs which have been cast on the inner side of the plate. The holding devices which hold the plate at the trimming station are formed to hold the plate so as not to interfere with the operation of the various trimming devices as described.

The travelling carriage for the trimming devices, as described, also serves to take the trimmed plate with it on its backward or return trip and to deliver it at a delivery and cooling station from which the plate may be taken and put upon the press cylinder.

In the embodied form, more in detail, the machine is provided with a power shaft, or shafts, upon which are various cams or other suitable actuating devices and connections therefrom, which operate the core rotating, plate lifting, plate conveying and trimming mechanism, together with the other devices referred to, the rotation or operation of the shaft being controlled by the completion of the pouring of the hot metal into the casting chamber. The pouring operation in this present embodiment is preferably manually operated or controlled, and as shown, the hot metal pump has a handle worked by an attendant, and after or upon the completion of the pump stroke, the power shaft turns over automatically and the various operations on the plate follow sequentially in the machine until the plate is finished and ready for delivery.

Referring now in detail to the embodiment illustrated by way of example in the accompanying drawings, the plate casting mechanism comprises a horizontally disposed casting core I provided with a shaft 2, suitably journaled in the machine frame, the core or cylinderl being rotatable. As embodied, the stereotype plate is cast against the under side of the core, the core thereafter being given a half rotation, whereby the plate is brought to the top of the core preparatory to conveyance or delivery therefrom to the subsequently operating mechanisms of the machine.

Cooperating with the core I is a concave casting member 3, slidable vertically toward the core I, on the under side thereof, to form the casting chamber into which the hot metal is poured to cast the plate, and slidable away therefrom to afford clearance for the rotation of the core and the delivery of the cast plate. A slidable mounting for the concave member 3 comprises arms 4 and 5, working, respectively, in guideways 6 and I in the machine frame, there being a pair of these guideways at either end of the concave member 3. Suitable matrix clamps and edge stops are provided, which may be of any suitable or adequate form, and have been omitted from the drawing for the sake of clearness.

The mechanism for vertically reciprocating the concave member 3 to and fro, comprises a pair of arms 8 and 9, likewise formed on the back of the member 3 and extending downwardly therefrom, said arms having mounted in their lower ends friction rollers II] and I I, which rollers bear, respectively, on cams I2 and I3, which are fixed on a shaft I4. In this embodiment the shaft I4 may be styled the main or power shaft of the machine, as it extends throughout the length of the machine and actuates most of the mechanisms which operate upon the plate. The rotation of the shaft I4, through the cams I2 and I3 moves the concave member 3 to casting position, holds it there while the plate is being cast, and thereafter retracts concave member 3, preparatory to the delivery of the plate.

Referring now to the embodied form of means for eifecting and controlling the rotary movements of the casting core I, that is for holding it at the casting position to make the cast, rotating it a half turn between the casting and plate delivery position, and holding it at the latter position while the plate is being delivered, said means co-mprises a gear wheel I9 fixed on. the shaft 2 of the core I, and meshing therewith a gear wheel 20, which is supported on a short shaft journaled in the machine frame (see Figs. 1 and 4). Fixed to one face of the gear wheel 20, to rotate therewith, is a cam wheel 2I (Figs. 1, 3 and 4) Cam wheel 2| has formed in its exterior flat face a series of straight, intersecting, radially disposed cam ways 22, preferably four in number. Fixed on shaft I4 is an arm 23 provided with a cam roller 24, which roller during the rotation of shaft I4 is adapted to enter one of the cam ways 22, and thereby to impart a quarter rotation to the cam wheel 20 for each revolution of shaft I4. The cam roller 24 then leaves the particular cam way 22, and on its next revolution. the roller 24 enters the next cam way 22 to repeat the motion just described. Gear wheel 20 receives a quarter rotation with the cam wheel 2|, thereby imparting, by reason of the ratio between gear wheels I9 and 20, a half rotation to the gear wheel I9 and therewith to the casting core I. The cam roller 24 enters the lower right hand cam way 22, when in the position shown in Fig. 4, and leaves it when such cam way is in the position of the next adjacent cam way 22 to the left, as shown in Fig. 4. Figure 3 shows the parts midway of this movement. The core is thus given a half rotation between the casting and delivery positions between successive casts and deliveries, successive plates being cast on opposite sides of the core.

Means are provided for holding the core stationary for the period of the delivery and casting of the next plate, and as embodied a plurality of rollers 25 are rotatably mounted on the exterior face of the cam wheel 2|. Fixed on, shaft I4 in definite relation to the arm 23, and preferably fixed thereto or integral therewith, is an arcuate plate 26 provided with a guideway 27 for the rollers 25, the guideway being concentric with the shaft I4 (Figs. 1, 3 and 4). As the shaft I4 rotates to effect the movement of the core I already described, as cam roller 24 leaves the cam way 22, one of the rollers 25 enters the forward end of guideway 21, and thereafter the diametrally 0pposite roller 25 also enters the guideway 21 (see Fig. 4) andthe entire mechanism just described, including the casting core I, is held in fixed position while the rollers 25 pass through the guideway 21. The last roller 25 leaves the guideway 21, when a new plate is cast, preparatory toroller 24 engaging another cam way 22, preparatory to rotating the newly cast plate to the delivery position.

The embodied form of mechanism. for supplying the hot metal to the casting chamber comprises a pump and delivery spout therefor, which moveto and from casting position. As embodied, a hot metal reservoir 30 is provided, within. which a pump 3| is suspended by upwardly extending arms 32 and 33 (see Figs. 2, 7 and 8). Arms 32 and 33 are provided with laterally extending guides 34 and 35, which work in corresponding guideways formed in arms 36 and 31, which arms are fixed to and project from a part 38 of the machine frame. As the arms 32 and 33 reciprocate in their guidew'ays, the pump 30 and its delivery spout 39 move to and fro, the mouth of the spout coming to casting position at the proper time, remaining to deliver the hot metal into the casting chamber, and thereafter receding to give clearance for the operation of the casting mechanism, including the rotation of the core I between casting and delivery positions.

The embodied form of means for imparting these movements to the pump and its spout (see Figs. 1, '7 and 8) comprises a cam 40, fixed on shaft I4, and having therein a cam groove 4|. A rod 42 has a yoke 43 straddling the shaft I4, and mounted on rod 42 is a cam. roller 44 working in the cam groove 4|. At its opposite end rod 42 is pivotally connected to an arm 45, fixed on a shaft 45, which shaft is journaled in brackets 41 and 48, formed on the machine frame, and also in the supporting guide arms 33 and 31. Fixed on. shaft 46 is a pair of arms 49 and 50, which are pivoted, respectively, to the pump supporting arms 32 and 33 by means of a pin and slot connection 49. Thus as cam 43 rotates, rod 42 is reciprocated, shaft 46 is rocked, thereby moving or sliding arms 32 and 33 in their respective guideways', and imparting to pump 3| and its spout the movements already described.

The pump in the present embodiment and in accordance with certain features of the invention is operated by the attendant, and as embodied a pump handle 52 is pivoted at 53 upon the machine frame. Pivoted to the opposite end of the handle or lever 52 is a rod 54, pivoted at 55 to a rod 58, which latter rod carries the pump plunger. This connection allows for the to and fro movement of the pump already described. In accordance with one feature of the invention the machine is called into action by the operator or attendant, and as embodied this is effected through the actuation of the pump handle, as will be later described.

Referring now to the embodied form of means for removing or lifting the plate from the casting core I (see Figs. 1 and 2) a stop E5 is provided on the machine frame, against which the forward straight edge of the cast plate engages as it rotates with the core I in coming from the plate casting to the plate delivering position. On the opposite side of the core I is provided a plate lifter 65, adapted to engage with the other straight edge of the cast plate, and having vertical movement to lift the plate away from the core I, preparatory to its conveyance to the plate finishing station.

The lifter is mounted in guideways 61 in the machine frame to have vertical reciprocation. In the embodied form of actuating means for the plate lifter, there is pivoted at 68 to the plate lifter 66 a rod 69, which rod at its other end 10 is pivoted to a lever ll, which lever is journaled on a shaft 12 mounted in the machine frame. Pivoted to the lever II at its other end I3 is a rod 14, which rod is pivoted at T5 to a. bent lever I6, which lever is journaled on a shaft 11 mounted in the machine frame. At its other end lever 18 is provided with a cam roller I8, this cam roller cooperating with a cam 19 fixed on the shaft l4. When the forward straight edge of the cast plate engages with the fixed stop 35, lifter 63 is behind or comes behand the other straight edge of the cast plate, and it is then moved upwardly by the mechanism just described and the plate is lifted from core I to position to be conveyed to the trimming station.

Referring now to the embodied form of means for conveying the plate between the position just described and the trimming station or mechanism, a pusher is fixed upon one end of a long horizontally disposed bar 85 (Figs. 1, 2, 3, 4 and 5). The opposite ends of the pusher 85 engage with and run along horizontally disposed guides 83 and 84, mounted on the machine frame. The bar 83 is mounted in a guideway 81 located at the top of frame of the trimming station (Figs. 1 and 5). Guideway 81 consists of two parallel side members 88 and 89 adapted to fit the shape of the reciprocating bar 85, which is that of an inverted T. The upper part of the bar 35 projects through the guideway between the members 88 and 89, and is provided with a toothed rack or straight gear 90. Meshing with the straight gear 90 is a gear wheel 9i, fixed on a shaft 92, which shaft is journaled in a bearing 93, fixed on the machine frame. Fixed also on shaft 92 is a gear pinion 94, with which meshes a toothed rack or straight gear formed on a reciprocating bar 95 (Figs. 1, 5 and 11). Bar 95 is held to pinion 94 by a guideway formed in a bracket 96 supported on shaft 92.

The embodied form of means for reciprocating rack bar 95 comprises a crank arm 93 to which the lower end of rack bar 95 is pivotally connected. i

the rack bar thus reciprocating as the crank rotates. Crank arm 98 is fixed to a shaft 99 (Figs. 1, 5, 6 and '7), which shaft is journaled in bearings I00 and HH, supported on the machine frame. I62, which meshes with a beveled gear wheel Hi3, fixed on shaft l4. Thus, as crank arm 98 is 1'0- tated, rack bar 95 reciprocates to and fro, and through pinion 94 and gear wheel 91, reciprocates rod 86. right in Fig. l, and thereafter the lifting mechanism lifts the plate :r in front of it. On the reverse movement of the mechanism, the cast plate is moved to the left by the pusher 85 toward and into the plate trimming mechanism, the end of the travel of the pusher positioning the plate for trimming within the trimming mechanism. A support I34 is provided for carrying the plate during this travel.

Atthe trimming station the straight edges of the plate are trimmed. The plate is preferably cast with a riser, or a piece of waste metal, along each of the straight edges, thereby insuring sound metal throughout the extent of the plate itself. In the present embodiment, therefore, both of the straight edges of the plate are broached or trimmed, and the interior concave ribs on the plate are shaved at a single operation.

Suitable devices are provided for firmly holding the plate during the trimming operation, and

Fixed to shaft 99 is a beveled gear wheel Pusher 85 is thereby traveled to the 5;

as embodied, clamps H3 and H4 are provided (Figs. 5, 12 and 13), which are arranged in pairs at either end of and beneath the straight edges of the plate as it rests in the trimming position, and are then swung upwardly to clamp the plate firmly in position against the arch of the trimming mechanism, as shown in Fig. 5. While the plate is thus held, the straight edges are out, and the clamps H3 and H4 then swing downwardly to discharge the severed risers, the plate at the same time dropping to rest on the mechanism which removes it from the trimming to the delivery station.

Clamping arms H3 are fixed to a shaft II 5 journaled on the frame, and clamping arms H4 are fixed to a shaft I I6, journaled on the machine frame. Shafts H5 and HIE are connected together by a geared sector I I1 on shaft H5 meshing with a geared sector H8 on shaft II6. A connecting rod H9 is pivotally connected at its upper end to an arm I20 fixed to shaft I I5. At its opposite end, red I I 9 has a yoke I2I which straddles shaft I4. A cam roller I22 is carried on rod I I9, and cooperates with a cam I23, fixed on shaft I4 to rotate therewith. A spring I24 is in tension between the arm I20 and the machine frame to hold the cam roller I22 to cam I23. The manner of operation of this mechanism has already been described.

Means are provided for preventing backward movement of the plate in the trimming mechanism, the embodied form thereof being adapted to cooperate with a semi-circular shaving or planing knife which travels longitudinally and interlorly of the cast plate to shave or finish the arcuate ribs on the interior of the plate. As embodied, an arcuate stop I25 is adapted to swing down in the rear of the plate :2, while not projecting below the inside surface of the plate (Figs. 1 and 5). The stop I25 is pivotally mounted at I26 on a bracket I21, which is supported on the machine frame. Fixed to the stop I25 is a lever I28, and pivotally connected to the lever at I29 is a rod I30. At its other end I3I, this rod is pivotally connected to a lever I32, which lever is mounted on a shaft I33, supported on the machine frame. At its opposite end shaft I33, has a cam roll I34, which cooperates with a cam I35 fixed on the shaft I4. A spring I36 in tension between lever I 22 and a support on the machine frame serves to hold lever I32 to its cam I35. The stop I25 is in raised position as the plate advances and then moves downwardly behind the plate, holding it at the rear while the trimming or finishing devices effects the shaving action along the interior of the plate from the opposite end.

A suitable plate holding device is provided for supporting the plate especially after the finishing device has passed into the interior of the plate, and after the risers have been cut off the straight edges of the plate, and prior to the removal of the plate, carried by the finishing device, as will be hereinafter more fully described. (See Figs. 1, 7, 9 and 10.) This mechanism also serves to hold the plate firmly in position relatively to the trimming devices so that there will be no movement of the plate during the finishing and so that the cutting of the straight edges and the shaving of the rim will be true throughout the plate.

In the embodied form of said mechanism, an arm I46 is fixed on a shaft I41, journaled in brackets I48 and I49, which are supported on the frame of the trimming station. Pivotally mounted at I50 on arm I46 is a hook I5I, this hook having a plate engaging surface I52, which engages the plate a: interiorly thereof and at the crown of its arc and presses it firmly against the frame of the trimming station. On the opposite side of its pivot point I50, the hook I5I has a tail I53, which is acted on by a suitable spring I54. A limiting pin I 55 is also mounted in the arm I46. Fixed to shaft I41 is an arm I58, and pivotally connected to the end of arm I58 at I59 is a rod I60. Rod I60 at its lower end (Figs. 5 and 6) is of yoked or annular form, as shown at I6I, and is provided with cam rollers I62 and I63 which cooperate with a cam I64, fixed on shaft 99.

As previously stated, and as will hereinafter be more fully described, the finishing mechanism enters the plate from the left hand end in Fig. 1, passes within and longitudinally of the plate a: to effect the finishing, and thereafter travels in the opposite or return direction taking the finished plate with it to the delivery station. As embodied (Figs. 1, 9 and 10) there is formed in the top and forward portion of the finishing mechanism a curved cam surface I65. The cam I64 is so timed that during the advancing movement of the trimming mechanism, the plate supporting hook I5I which at this time is yieldingly pushed against stop pin I55 by spring I54, drops into the cam recess I65. As the trimming device advances, the hook I5I rides up the left hand side (in Fig. 10) of the curved cam surface I 65 onto the straight cam or bearing surface I66, the spring I54 yielding to permit this movement.

In this position the hook I5I is in fixed relation relatively to the cutter on the finishing mechanism, and as it directly engages the plate :6, the plate is held firmly and in true position during the entire finishing operation, thereby effecting a uniform and true finish on the plate. This also prevents this end of the plate from dropping downwardly when the risers are cut off from the straight edge. After the finishing device has completed its stroke, cam I64 swings arms I58 and I46 to the left in Fig. 10, and brings them to the position of Fig. 9 and clear of the plate.

Referring now in detail to the plate finishing devices, such devices in the present embodiment reciprocate to and fro in a straight line, on the forward stroke cutting off the risers from both the straight edges of the plate and at the same time shaving the arcuate ribs on the interior of the plate by means of a semi-circular cutter. The finished plate is then dropped onto the back or top of the finishing device, which on its return reciprocatory movement conveys the plate to the delivery and cooling position.

As embodied, a screw shaft I15 is rotatably journaled in bearings I16 and I11 in the machine frame so as to have rotation without longitudinal movement (Figs. 1, 7 and 12). Screw shaft I15 is rotated first in one direction and then in the other to give reciprocatory longitudinal travel to the finishing device, which is threaded on the shaft. For this purpose there is fixed on the exterior end of screw shaft I15 a pinion I18. Pinion I18 meshes with an intermediate gear wheel I19. Gear wheel I19 meshes with the gear wheel I80 fixed on a shaft IBI. Fixed also on shaft I8I is a gear wheel I82, with which meshes a gear sector I83, journaled on shaft I84, which shaft is journaled in the machine frame. Pivotally connected to geared sector I83 at I85 is a connecting rod I86, which at its opposite end I81 is pivoted to Eli rash

crank arm I88 which crank arm is fixed on shaft I4. Thus as shaft I4 rotates and crank arm I88 therewith, geared sector I83 is oscillated first in one direction then in the other, and by the multiplying gears just described, screw shaft I16 is rotated first in one direction and then in the other to impart to the finishing mechanism the necessary longitudinal reciprocatory movement.

In the embodiment form the finishing device" comprising a hub 200, screw threaded on shaft I15, a vertically disposed supporting plate 2M being fixed to or integral with hub 280. The plate 2III is also connected to the hub 200 by stiffening webs 202 and 283. Longitudinally disposed guides I93 and I99 are provided, along which the finishing device reciprocates in its travel. Supported on the front of plate 20I are two forwardly projecting breaching cutters 204 and 205, located and shaped to cut off the two straight edges of the plate which is held in position at the finishing station by the clamping arms H3 and H4. The internal arcuate ribs on the cast plate are shaved by a semicircular cutter 206, carried in fixed position upon the front of the plate 2M, and fixed thereto by suitable means, such as bolts 28! passing through holes 288 in the cutter. The edge 28E of the cutter is of approximately semicircular form, and it passes across the ribs on the inside of the plate during the longitudinal travel of the finishing device, the-reby shaving the backs o f the ribs to true form.

As previously stated, the finishing device serves also to convey the finished plate from the finishing station to the delivery and cooling station, and the plate carrying part or means of the finishing device comprises a curved saddle 2I0 projecting rearwardly from the plate 2III (Figs. 1, 10 and 14) and being of arcuate outer form so as to fit beneath the upper or crown portion of the plate edge. A supporting web 2 also extends backwardly from the hub 298 as a stiffener and support beneath the saddle 2). The cam ,grooves I65 and IE5 referred to in connection with the. description of the plate supporting hook I 5| are formed in this saddle 2I8 (Figs. and 13).

After the breaches IE4 and 285 have cut through the straight edges of the plate and the circular cutter 255 has shaved the backs of the ribs, the finishing device comes to rest with the cutter 2GB just to the right of plate in Figs. 1 and 12. The saddle 2 i0 is just beneath the plate and of substantially the same length. Clamping levers H3 and H4 swing downwardly, releasing the plate, and dropping the cut off risers out of the machine, hook I5! swings clear of the plate to the position of Fig. 9, and the plate drops very slightly on tothe saddle 2I8. Gear sector I33 changes its direction of rotation as does also screw shaft I15, and the finishing device travels on its return movement, to the left in Fig. 1, to the position shown in that figure, carrying with it the finished plate.

stated, the plate x now completely finished, is brought to the delivery position and left thereupon a support to be removed by an attendant. The plate support comprises two curved members 2H and 2I2 (Figs. 1, '7 and 14). The plate sup porting members 2! i and 2 I 2 are recessed at their top forward end to receive the saddle 2I8, which slides in between them as best shown in Fig. 14. Air circulating recesses ZIE- may al o be provided if desired. By the return movement of the saddie 2H3, the plate is slid upon the supports 2H and 2I2, and remains there on the next forward movement of the saddle.

In the embodied form the machine is driven from a. single motor, and as already described, the various mechanisms are actuated from shaft I4 or from the shafts driven therefrom, although any suitable form of drive might be employed so far as concerns most features of the invention; The embodied form of drive for shaft I4 comprises a worm wheel 220, fixed on shaft I4; Worm Wheel 22!! meshes with a worm 22I, which worm is fixed on a-shaft 222, journaled in bearings 22-3 and 224 on the machine frame. Fixed also ori shaft 2221s a gear wheel 225, with which meshes a pinion 226, fixed on the shaft of motor 221.

In the embodied. form, as stated, the machine is called into action by the operator actuating the pumphandle 52 in making the cast. The embodied form of means for accomplishing this comprises or cooperates with devices for bringing the matrix. holder to casting position preparatory to pumping the hot metal. In such embodiment, a switch lever 236 is pivotally mounted on the frame to constitute a circuit terminal 238, and is moved by the pump handle 52 to momentarily close the circuit as terminal 239 (Fig. 2). Switch lever 238 at its opposite end is pivotally connected toa link 229, which link is also pivotally connected to the pump handle52. The handle 52 is connected to the pump rod 54 by a pin and slot connection 23I, which permits the handle 52 to operate switch 236 sufficiently in advance of the pumping operation to start the machine and to bring the matrix carrier 3 from its depressed or open position to the closed or casting position shown in Fig. 2 prior to the pouring of the metal into the casting chamber. A spring 232 in compression between the pump handle 52 and a support 233 on the machine frame keeps the pin on pump lever 52 normally in the bottom of slot 23I.

In the operation of the device, when the machine is ready for casting but while it is .at rest, pump handle 52 is depressed, and thus swings switch lever 236, making the circuit between terminals 238 and 239. This energizes relay coil 258, the further connections for which will be later described, thereby starting the machine. When the machine starts, the concave 3 is brought to casting position, and thereafter, the pump handle continuing its downward stroke, and the pin reaching the upper end of slot 23I, the pump is actuated, to pour the hot metal into the casting chamber. Means are preferably provided for guarding against the pump being actuated if there is no matrix in casting position and to prevent the pumping action before the concave 3 is at casting position, which will be described later.

The machine is brought to rest, in the embodied form, by the conveyor 85 returning to the trimming station without a plate. The means for effecting this comprises a switch operating lever 240, pivoted to 24I on the conveyor 85, and the switch engaging end of lever 240 is impelled into operative position by a spring 242. Beneath the other end of the lever 240 is a longitudinally slidable pin 243, shaped at its bottom 244 to engage with the cast plate at, as the plate is lifted to delivery position from the casting core I. Pin 243 is supported by, and is slidable in, bearings 245 and 246 on the conveyor 85.

The switch with which the foregoing mechanism cooperates comprisesa lever 241 making and breaking the circuit between terminals 248 and 249, the circuit connections of which terminals will be later described. The switch is impelled to circuit-closing position by a spring 250.

If a plate is fed to the conveyor at the casting position, lever 248 will be moved to inoperative position, as shown in Fig. l, by the sliding pin 243, and switch 241 will remain closed when conveyor 85 brings plate x into the trimming station to be trimmed. If, on the other hand, no plate is taken by conveyor 85 at the casting station,

7 standard form, so far as concerns many features of the invention. In Fig. 1'1 is diagrammatically shown one form of electrical controlling and operating mechanism, the relation of the terminals 238, 239 and 248 and 249 and of switches 235 and 241 being shown therein. Said mechanism comprises a relay device 253 and a self starter 254, the power lines being indicated conventionally. When relay 253 is closed, it connects the current through the self starter 254, which in turn, by controlling the motor circuit in the usual manner, starts the motor 221, thereby starting the machine. When relay device 253 is opened, the motor 221 is stopped, thereby stopping the machine, the current supply to the self starter being controlled by switch 251 of the relay.

In operation, when switch 235 is closed by the pump handle 52, relay switch 251 is closed by the current through coil 258 of the relay device 253, and motor is started by the self starter. The switch 235 is closed but momentarily, but when is opens, switch 251 of the relay does not, open, but is held closed through the resistance or holding coil 258 of the relay, provided switch 241 is closed (which is the case except when conveyor 85 reaches the trimming station without a plate). Coil 258 will not let through enough current to close relay switch 251, but when the switch is already closed, the coil will hold it in closed position. When the casting has stopped, conveyor 85 will reach the trimming station without a plate, switch 241 will be thereby opened, and coil 250 will release switch 251, and the self starter 254 will cut off the current in the motor circuit and the motor will be stopped thereby stopping the machine.

Thus, whenever the pump handle 52 is actuated, the motor 221 will start, starting the machine, and it will run so long as a plate is cast every time the machine comes into position for it. When the desired or required number of plates has been cast and the castings discontinued, the machine will still make another revolution to finish and deliver the last plate cast. It will then stop by reason of the lever 240 opening switch 241 on the first idle reciprocation of the conveyor 85, as already described.

As the machine is shown in Fig. 1 the parts are not exactly timed, but are shown in what is believed to be the clearest positions for reading the drawings. As embodied, the operating of delivering a particular plate from the casting box and conveying it into the trimming station is effected on one revolution of the machine, and concurrently or in timed relation therewith, the last previously cast plate is trimmed and is then conveyed to the delivery or storage position. The

particular plate first referred to is trimmed and stored on the next revolution of the machine, but the equivalent of a complete plate is produced on each revolution of the machine.

The machine is so timed that it will stop so that the casting chamber will be in open position to permit change of matrices, and so that the last plate sent through will be finished and delivered or stored. Thus when the carriage 280, which is equipped with the trimming devices and the plate delivering saddle 2H1, is in the position of Fig. l, the plate conveyor 85 is at the left hand end of its travel in Fig. 1 (shown in dotted line) and the casting chamber is open.

In Fig. 17, hand-operated switches are shown for manual control of the machine. When the Run button is pushed to the in position the machine will operate as described. When the Safe button is in, the machine will not run at all until the Run button is again pressed. When the 'YStop button is pressed, the machine will stop at once without going to the end of its cycle. By means of the Inch button, the machine can be turned over slowly, by degrees, or inched along for any purpose. The connections and operation of the foregoing will be clear from an inspection of Fig. 1'1 without further detailed description.

The embodied form of safety device for preventing the untimely pumping of the hot metal already referred to, comprises a hook 218, pivoted on the machine frame at 21l, the tail 212 of the hook being in position to be tripped by the concave or matrix carrier 3 coming to casting position, and is normally supported in this position by a lug 211 on the machine frame. Pivotally supported at 213 on the pump handle 52 is a rod 214, extending downwardly and reciprocable in a guide 215 on the machine frame. Rod 214 has a lug 216 formed thereon. When the concave 3 is away from casting position, hook 218 is in position to engage with lug 215 and thus to prevent pump handle 52 being depressed. When, however, concave 3 comes to casting position, it tilts hook 210 as shown in Fig. 2, and hook 210 is rocked back so that lug 215 on rod 213 is free to pass and the pump handle may be actuated. The pivot point of lever 210 is positioned so that the thrust of lug 215 is radial when hook 210 is in engaging position, so that the lug 215 will not rock the hook out of engaging position.

Means are preferably provided in cooperation with the foregoing to prevent the starting of the machine when there is no matrix in the concave 3. As embodied, the matrix holder 218 is slid in guideways 219 and 280 in the concave 3, and when the matrix is in casting position with respect to its carrier 3, the holder 218 closes a switch 28l, which is in series with switch 235 and is automatically opened by a spring 283 whenever the matrix holder is withdrawn from, or is not in proper position within, the matrix carrier 3. The matrix holder 218 is provided with a projection 282 which closes or bridges the terminals of switch 2! when the matrix holder 218 is in proper casting position.

It will be seen that the pump handle cannot be actuated further than to close switch 235 until the concave 3 is in casting position, and to bring the concave to casting position, requires that the machine be started. The machine cannot be started until switch 28! is closed and this switch is closed only when a matrix is in proper place within the carrier or concave 3. When the matrix is so placed and switch 28I is consequently closed, the closing of switch 236 by the pump handle 52 starts the machine. This brings the concave 3 to casting position, thereby rocking hook 219 out of the path of lug 216, and the hot metal can be pumped into the casting chamber.

In Figs. 16, 18 and 19, are shown details of the plate lifter which is shown in a general way in Fig. 1. The plate lifter 66, it will be recalled, reciprocates in the vertically disposed guideways 91. The lifter comprises the plate engaging member 299, a carrier 29l therefor reciprocating in the guideways 61, the plate engaging member being movable on its carrier, first to permit the cast plate a: to pass it, and then to get on the underside of the straight edge of the plate I to lift it ready for delivery. The lifter 66 also comprises means or devices for effecting the described relative movements between the lifter and its carrier.

As embodied, the carrier for the plate lifter proper 299 comprises a slide 29I, mounted to reciprocate in the two vertically disposed guides 91, which guidesare mounted, as stated, on the machine frame. This slide is shown as having two side arms 292 and 293, which slide in the guideways 67, and a cross connecting piece 294, at the bottom end. This cross-piece is provided with lugs 295 and 296', to which the actuating rod 69 is pivotally connected at 68.

The plate lifter 299 is pivotally mounted at its lower end in the slide by means of a pin 291 (Figs. 16, 18 and 19). The lifter proper 299, near the upper end of the side members of the slide has at each side bearing lugs 299 and 299, which keep it in position within the slide. Mounted on the lifter 299, near the bottom end is a lug 399, internally apertured to receive a pin 39I, which pin is pivotally mounted in a lug 392, fixed to the cross-piece 294 of the slide. Coiled about pin 39I is a spring 393, in compression between the two lugs 399 and 392, and impelling the plate lifter 290 inwardly or to the right in Fig. 16.

Means are provided for holding the plate lifter 299 out, or to the left in Fig. 16, while the cylin- ,der I, with the cast plate a: is rotating from casting position to plate delivering position. As embodied, a rod 396 projects from the side of the plate lifter 299, and it is provided with a cam roller 391.

Pivotally mounted on the machine frame is a switch cam 398, the cam being fixed on a shaft 399, journaled in the machine frame at 3l9. A spring 3! I is coiled about shaft 399, with one end thereof fixed to the machine frame and the other end thereof fixed to a collar 3l2, fixed on shaft 399. The spring impels the switch cam into the position shown in full lines in Fig. 16.

In the operation of the device, as the plate lifter 299 moves downwardly from the full line position of Fig. 16 (after the plate a: has been conveyed away from the core I), it moved downwardly to the dotted line position in Fig. 16. During this downward movement of the plate lifter 299, the roller 39'! will run on the outside of the switch camv 398, the plate lifter 299 being thereby rocked away from the cylinder I.

At the end of the downward movement of the plate lifter 299, the roller 39'! will come below the switch cam 398, as indicated in dotted line position in Fig. 16. In the meantime the newly cast plate x has been rotated with cylinder I from casting position on the under side of the cylinder I to the plate deliveryposition on the top side of the cylinder. During such movement of the plate :0, due to roller 391 rolling on the outside of cam. 398, the plate lifter 299 is in the retracted position. On the succeeding upward movement of the plate lifter 299, the roller 391 is below the switch cam 398, as indicated in dotted lines in Fig. 16. From this position roller 39? passes inside or beneath the switch cam 398, and the plate lifter 299 will come up beneath the straight edge of the plate a: as shown in Fig. 16, and the plate will be lifted into position to be removed by the conveyor 85.

It will be understood that departures may be made from the details of invention as herein embodied and described, within the scope of the appended claims, without departing from the principles of the invention and without sacrificing its chief advantages.

What is claimed is:

1. A machine for operating on stereotype printing plates including in combination means for holding a curved stereotype plate stationary and means traveling within the concave part of the plate to trim a straight edge thereof.

2. A machine for operating on stereotype printing plates including in combination means for holding a curved stereotype plate having a riser on a straight edge thereof and cutting means traveling within the concave part of the plate to cut off the riser and to trim the inside of the plate.

3. A machine for operating on hemi-cylindrical stereotype printing plates including in combination a device for cutting the straight edge of the curved plate, said device comprising a straight cutting edge mounted to move in the concave part of the plate and means for moving said device in a straight line to effect the cutting action.

4. A machine for operating on hemi-cylindrical stereotype printing plates including in combination a device mounted to move within the concave part of the plate for cutting the straight edge of the plate, said device comprising a; straight cutting edge, means for holding the plate stationary during the cutting operation, and means for moving said device in a straight line to effect the cutting action, said cutting edge being disposed at an angle to the direction of travel of the device.

5. A machine for operating on hemi-cylindrical stereotype printing plates including in combination a device for cutting the straight edge of the curved plate, said device comprising a straight cutting edge means for effecting relative movement between the plate and said device in a straight line to effect the cutting action and means for simultaneously trimming the inside, concave part of the plate.

6. A machine for operating on stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate, a pair of cutters mounted to move within the concave portion of the plate and adapted to simultaneously out the straight edges of the plate and means for effecting relative movement between the plate and the knives.

7. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate, a pair of cutters mounted to move within the concave portion of the plate and adapted to simultaneously cut the straight edges of the plate, means for holding the plate stationary during the cutting operation, and means for moving the knives along the plate to cut the straight edges thereof.

8. A machine for operating upon stereotype printing plates including in combination means for supporting at rest a semi-cylindrical stereotype plate, a carriage provided with a knife for cutting a straight edge of the plate and mounted to reciprocate in the concave part of the plate when held by said supporting means.

9. A machine for operating upon stereotype printing plates including in combination normally stationary gripping means for supporting at rest a semi-cylindrical stereotype plate, a reciprocating carriage provided with a pair of knives for cutting both the straight edges of the plate and means on the reciprocating carriage for actuating the gripping means.

10. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate and an arcuate cutter traveling within and longitudinally of the plate to shave the arcuate ribs on the interior of the plate.

11. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate, cutter traveling within and longitudinally of the plate to shave the interior of the the plate and a simultaneously operated cutter for cutting the longitudinal edges of the plate.

12. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate, an arcuate cutter traveling within and longitudinally of the plate to shave the interior of the plate, and means to reciprocate the cutter past the plate supporting means.

13. A machine for operating upon stereotype stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate, an arcuate cutter traveling within and longitudinally of the plate to shave the interior of the plate, and means for effecting relative movement between the plate and cutter longitudinally of the plate.

14. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate and means for effecting relative movement between the cutters and the plate.

15. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, cutting longitudinally of the plate, and means for effecting relative movement simultaneously between both cutters and the plate.

16. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between the cutters and the plate including a carriage on which the cutters are mounted and means for effecting relative movement between the carriage and the plate.

17. A machine for operating upon steretotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between the cutters and the plate including a carriage on which the cutters are mounted and means for reciprocating the carriage past the plate.

18. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between the cutters and the plate, and a saddle for carrying away the trimmed plate.

19. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate cutting longitudinally of the plate, means for effecting relative movement between the cutters and the plate, and a saddle for carrying away the trimmed plate.

20. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between the cutters and the plate including a carriage on which the cutters are mounted, means for effecting relative movement between the carriage and the plate, and a saddle mounted on the carriage for conveying away the trimmed plate.

21. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, and means for effecting relative movement between the cutters and the plate.

22. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate cutting longitudinally of the plate, and means for effecting relative movement between the cutters and the plate.

23. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cut-ter for the interior of the plate, means for effecting relative movement between the cutters and the plate including a carriage on which the cutters are mounted, and means for effecting relative movement between the carriage and the plate. 1

24. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between the cutters and the plate, including a carriage on which the cutters are mounted and means for reciprocating the carriage past the plate.

25. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, two cutters, one for each of the straight edges of the plate, an arcuate cutter for the interiorof the plate and means for: effecting relative movement between all: the cutters simultaneously and the plate.

26. A machine for operating upon stereotype. printing plates including in combination means for supporting a semi-cylindrical plate',.means1 for automatically delivering a plate tov said; support, two: cutters, one for each of the straight: edges of. the plate, an. arcuate cutter for the interior ofithe plate; cutting longitudinally of the; plate, and: means for efiecting relative movement between all the cutters simultaneously and the plate.

27. A machine for operating upon stereotype: printing plates including in combination means" for supporting a semircylindricala plate, means for automatically delivering a plate to said. support, two cutters one for each. of the straight edges of. the plate, an arcuate cutter'for'the interior oflthe plate, and meansfor effecting relative movement between thercutters and the plate including a carriage, on which the cutters are mounted: and means for" effecting relative movement between the carriage and the plate.

28. A machine for operating upon stereotype printing plates including in combination. means for supporting a semi-cylindrical plate, means for: automatically delivering a plate to said support, two cutters, one for each of the straight edges of the plate, an arcuate cutter for the interior. of the plate, and means for efifecting relative: movement between the cutters and the plate, including a. carriage on which the cutters are mounted and means for reciprocating the carriage past the plate.

29. A machine for operating upon stereotype. printing plates, including in combination means for supporting a semi-cylindrical plate, means for automatically delivering. a plate insaidisup. port, a cutter for the straight edge of the. plate, an arcuate cutter for the interior of the plate, means for effecting. relative movement between the cutters and the plate, and a saddle for carrying away the trimmed plate.

30. A machine: for operating upon stereotype printing plates including incombination means for" supporting a. semi-cylindrical plate, means.

for automatically delivering a. plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means for effecting relative movement between all'the cutters simultaneously and the plate; and: a saddle for carrying away the trimmed plate: and delivering it toacooling station.

31'. A machine for operating upon stereotypeprinting plates including in combination means for supporting a semi-cylindrical plate; means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate cutting longitudinally of the plate, means for effecting relative movement between the cutters andthe plate, and a saddle fo-rcarrying away the trimmed plate.

32. A machine for operating upon stereotype printing plates including in combination means for" supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate cutting longitudinally of the plate, means for effecting relative movement between all the cutters' simultaneously and the plate, and a saddle for carrying away the trimmed platev and delivering it to a cooling station.

33. A machine for operating upon stereotype printing plates. including in combination means for supporting a semi-cylindrical plate, means for automatically delivering a plate to said support, a cutter for the straight edge of the plate, an arcuate cutter for the interior of the plate, means. for efiecting relative movement between the cutters and the plate, includin a carriage on which thecutters are mounted, means for efiecting relative movement between the carriage and the plate, and a saddle mounted on the carriage for conveying away the trimmed plate.

34. A machine for operating upon stereotype printing plates including in combination a trimming station, means for clamping a semi-cylindrical plate at the trimming station and means movable within the concave part of the plate for cutting thestraight edges thereof.

35.. A machine. foroperating upon stereotype printing plates including in combination a trimming station, means for clamping a semi-cylindrical plate at the: trimming station, means for cutting the straight. edges of the clamped plate and means for simultaneously trimming the interior of the plate,

36. A. machine for operating upon stereotype printing plates including in combination a trimming station, means for'clamping a semi-cylindrical plate. at the trimming station, means for cutting the straight edges of the clamped plate, and means traveling. longitudinally of the plate for simultaneously trimming the interior of the plate.

3'1. A machine for operating upon stereotype printing plates including in combination a trimming" station, means for clamping a semi-cylindrical plate at the trimming station, means for cutting the straight edges of the clamped plate, and" meanstravelingr longitudinally of the plate including an arcuate shaving knife for simultaneously tnmming'the interior of the plate.

38'. A machine for operating upon stereotype printing plates including in combination a trimming station, means for clamping a semi-cylindrlcal' plate at the trimming station, means for cutting the straight edges of the clamped plate, means for receiving the plate after the straight edges: arecut and conveying it away from the trimming'st'atiorr.

39*. A machine for operating upon stereotype printing plates including in combination a trimming station, means for clamping a semi-cylindricalplate at the trimming station, means for cutting the straight edges of the clamped plate, means for receiving the plate after the straight edges are cut, and conveying it away from the trimming station to a cooling station, and the cooling station for receiving the plate.

40. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate and an arcuate cutter travelling within and longitudinally of the plate to shave the arcuate ribs on the interior of the plate, a saddle for receiving, the shaved plate, av cooling station, and means for. conveying the. saddle and plate. to the cooling station. and. delivering the plate thereto.

41. Ina stereotype platefinishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof.

42; In a stereotype plate finishing machine, the combination of. means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and both longitudinal edges.

43. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means located to move within the concave portion of the plate for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof.

44. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means located to move within the concave portion of the plate for simultaneously trimming the inner, concave side of the plate, and both longitudinal edges.

45. A machine for operating on stereotype printing plates including in combination means for holding a curved stereotype plate stationary and means traveling within the concave part of the plate to trim a straight edge thereof and a longitudinally disposed guide along which said trimming means reciprocates in its travel.

46. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof and a longitudinally disposed guide along which said trimming means reciprocates in its travel.

4'7. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof, said trimming devices being mounted on the same carrying member, and means for reciprocating said carrier to trim the plate.

48. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof, said trimming devices being mounted on the same carrying member, means for reciprocating said carrier to trim the plate and a longitudinally disposed guide along which said carrier is recip rocated.

49. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, including devices pressing against the straight longitudinal edges thereof, and cutting means for simultaneously trimming the inner concave side of the plate, and a longitudinal edge thereof.

50; In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, including devices pressing against the straight longitudinal edges thereof, and cutting means for simultaneously trimming the inner concave side of the plate, and a. longitudinal edge thereof and a longitudinally disposed guide along which said trimming means reciprocates.

51. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and both longitudinal edges, said cutting means comprising a cutter for a longitudinal edge at either side and an arcuate cutter located between said longitudinal edge cutters.

52. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and both longitudinal edges, said cutting means comprising a cutter for a longitudinal edge at either side and an arcuate cutter located between said longitudinal edge cutters, and a longitudinally disposed guide along which said cutting means reciprocates.

53. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, and cutting means for simultaneously trimming the inner concave side of the plate, and both longitudinal edges, said cutting means comprising a cutter for a longitudinal edge at either side and an arcuate cutter located between said longitudinal edge cutters, and a longitudinally disposed guide located between said longitudinal edge cutters along which said cutting means reciprocates.

54. In a stereotype plate finishing machine, the combination of means for holding a curved stereotype plate, including devices pressing against the straight longitudinal edges of the plate, and cutting means for simultaneously trimming the inner concave side of the plate, and both longitudinal edges, said cutting means comprising a cutter for a longitudinal edge at either side and an arcuate cutter located between said longitudinal edge cutters and a longitudinally disposed guide located between said longitudinal edge cutters along which said cutting means reciprocates.

55. In a stereotype plate finishing machine in combination means for holding a curved stereotype plate including devices for holding the printing surface of the plate firmly against the curved surface of the trimming mechanism, cut ting means for simultaneously trimming the inner concave side of the plate and both longitudinal edges, including a reciprocating member carrying two longitudinal edge cutters and an arcuate cutter located between them, and a longitudinally disposed guideway along which said cutters reciprocate in their travel.

56. A stereotype plate finishing machine including in combination means for supporting a semi-cylindrical stereotype plate and clamping it firmly against the arch of the trimming mechanism, an arcuate cutter traveling within and longitudinally of the plate, longitudinally disposed guiding and supporting means on the opposite side of the cutter from the stereotype plate, and means for reciprocating the cutter along said guiding and supporting means to trim the plate.

57. A machine for operating on stereotype printing plates including in combination means for holding a curved stereotype plate stationary and means traveling within the concave part of the plate to trim a straight edge thereof and means operating automatically at the end of the trimming stroke to reverse the direction of travel of the trimming means.

58. A machine for operating upon stereotype printing plates including in combination means for supporting a semi-cylindrical stereotype plate and an arcuate cutter travelling within and iongitudinally of the plate to shave the arcuate ribs on the interior of the plate and means operating automatically at the end of the trimming stroke to reverse the direction of travel of the trimming means.

THE GOSS PRINTING PRESS 00., Assignee of Joseph J. Walse-r, Deceased. By J. A. RIGGS,

Vice President. 

